The thirteen-year-old author of this book invites you, his reader, to imagine a daily life in which your faculty of speech is taken away. Explaining that you’re hungry, or tired, or in pain, is now as beyond your powers as a chat with a friend. I’d like to push the thought-experiment a little further. Now imagine that after you lose your ability to communicate, the editor-in-residence who orders your thoughts walks out without notice. The chances are that you never knew this mind-editor existed, but now that he or she has gone, you realize too late how the editor allowed your mind to function for all these years. A dam-burst of ideas, memories, impulses and thoughts is cascading over you, unstoppably. Your editor controlled this flow, diverting the vast majority away, and recommending just a tiny number for your conscious consideration. But now you’re on your own.

Now your mind is a room where twenty radios, all tuned to different stations, are blaring out voices and music. The radios have no off-switches or volume controls, the room you’re in has no door or window, and relief will come only when you’re too exhausted to stay awake. To make matters worse, another hitherto unrecognized editor has just quit without notice—your editor of the senses. Suddenly sensory input from your environment is flooding in too, unfiltered in quality and overwhelming in quantity. Colors and patterns swim and clamor for your attention. The fabric softener in your sweater smells as strong as air freshener fired up your nostrils. Your comfy jeans are now as scratchy as steel wool. Your vestibular and proprioceptive senses are also out of kilter, so the floor keeps tilting like a ferry in heavy seas, and you’re no longer sure where your hands and feet are in relation to the rest of you. You can feel the plates of your skull, plus your facial muscles and your jaw; your head feels trapped inside a motorcycle helmet three sizes too small which may or may not explain why the air conditioner is as deafening as an electric drill, but your father—who’s right here in front of you—sounds as if he’s speaking to you from a cellphone, on a train going through lots of short tunnels, in fluent Cantonese. You are no longer able to comprehend your mother tongue, or any tongue: from now on, all languages will be foreign languages. Even your sense of time has gone, rendering you unable to distinguish between a minute and an hour, as if you’ve been entombed in an Emily Dickinson poem about eternity, or locked into a time-bending SF film. Poems and films, however, come to an end, whereas this is your new ongoing reality. Autism is a lifelong condition.

Thanks for sticking to the end, though the real end, for most of us, would involve sedation and being forcibly hospitalized, and what happens next it’s better not to speculate. Yet for those people born onto the autistic spectrum, this unedited, unfiltered and scary-as-all-hell reality is home. The functions that genetics bestows on the rest of us—the “editors”—as a birthright, people with autism must spend their lives learning how to simulate. It is an intellectual and emotional task of Herculean, Sisyphean and Titanic proportions, and if the autistic people who undertake it aren’t heroes, then I don’t know what heroism is, never mind that the heroes have no choice. Sentience itself is not so much a fact to be taken for granted, but a brickby-brick, self-built construct requiring constant maintenance. As if this wasn’t a tall enough order, people with autism must survive in an outside world where “special needs” is playground slang for “retarded,” where melt-downs and panic attacks are viewed as tantrums, where disability allowance claimants are assumed by many to be welfare scroungers, and where British foreign policy can be described as “autistic” by a French minister. (M. Lelloucheapologized later, explaining that he never dreamed that the adjective could have caused offense. I don’t doubt it.)

Autism is no cakewalk for the child’s parents or carers either, and raising an autistic son or daughter is no job for the fainthearted—in fact, faintheartedness is doomed by the fi rst niggling doubt that there’s Something Not Quite Right about your sixteen-month-old. On Diagnosis Day, a child psychologist hands down the verdict with a worn-smooth truism about your son still being the same little guy that he was before this life-redefining news was confirmed. Then you run the gauntlet of other people’s reactions: “It’s just so sad”; “What, so he’s going to be like Dustin Hoffman in Rain Man?”; “I hope you’re not going to take this so-called ‘diagnosis’ lying down!”; and my favorite, “Yes, well, I told my pediatrician where to go stick his MMR jabs.” Your first contacts with most support agencies will put the last nails in the coffin of faintheartedness, and graft onto you a layer of scar tissue and cynicism as thick as rhino hide. There are gifted and resourceful people working in autism support, but with depressing regularity government policy appears to be about Band-Aids and fig leaves, and not about realizing the potential of children with special needs and helping them become long-term net contributors to society. The scant silver lining is that medical theory is no longer blaming your wife for causing the autism by being a “Refrigerator Mother” as it did not so long ago (Refrigerator Fathers were unavailable for comment) and that you don’t live in a society where people with autism are believed to be witches or devils and get treated accordingly.

Another category is the more confessional memoir, usually written by a parent, describing the impact of autism on the family and sometimes the positive effect of an unorthodox treatment. These memoirs are media-friendly and raise the profile of autism in the marketplace of worthy causes, but I have found their practical use to be limited, and in fairness they usually aren’t written to be useful. Every autistic person exhibits his or her own variation of the condition—autism is more like retina patterns than measles—and the more unorthodox the treatment for one child, the less likely it is to help another (mine, for example).

A fourth category of autism book is the “autism autobiography” written by insiders on the autistic spectrum, the most famous example being Thinking in Pictures by Temple Grandin. For sure, these books are often illuminating, but almost by definition they tend to be written by adults who have already worked things out, and they couldn’t help me where I needed help most: to understand why my three-year-old was banging his head against the floor; or flapping his fingers in front of his eyes at high speed; or suffering from skin so sensitive that he couldn’t sit or lie down; or howling with grief for forty-five minutes when the Pingu DVD was too scratched for the DVD player to read it. My reading provided theories, angles, anecdotes and guesses about these challenges, but without reasons all I could do was look on, helplessly.

One day my wife received a remarkable book she had ordered from Japan called The Reason I Jump. Its author, Naoki Higashida, was born in 1992 and was still in junior high school when the book was published. Naoki’s autism is severe enough to make spoken communication pretty much impossible, even now. But thanks to an ambitious teacher and his own persistence, he learned to spell out words directly onto an alphabet grid. A Japanese alphabet grid is a table of the basic forty Japanese hiragana letters, and its English counterpart is a copy of the qwerty keyboard, drawn onto a card and laminated. Naoki communicates by pointing to the letters on these grids to spell out whole words, which a helper at his side then transcribes. These words build up into sentences, paragraphs and entire books. “Extras” around the side of the grids include numbers, punctuation, and the words finished, yes and no. (Although Naoki can also write and blog directly onto a computer via its keyboard, he finds the lower-tech alphabet grid a “steadier handrail” as it offers fewer distractions and helps him to focus.) Even in primary school this method enabled him to communicate with others, and compose poems and story books, but it was his explanations about why children with autism do what they do that were, literally, the answers that we had been waiting for. Composed by a writer still with one foot in childhood, and whose autism was at least as challenging and life-altering as our son’s, The Reason I Jump was a revelatory godsend. Reading it felt as if, for the first time, our own son was talking to us about what was happening inside his head, through Naoki’s words.

The book goes much further than providing information, however: it offers up proof that locked inside the helpless-seeming autistic body is a mind as curious, subtle and complex as yours, as mine, as anyone’s. During the 24/7 grind of being a carer, it’s all too easy to forget the fact that the person you’re doing so much for is, and is obliged to be, more resourceful than you in many respects. As the months turn into years “forgetting” can become “disbelieving,” and this lack of faith makes both the carer and the cared-for vulnerable to negativities. Naoki Higashida’s gift is to restore faith: by demonstrating intellectual acuity and spiritual curiosity; by analysis of his environment and his condition; and by a puckish sense of humor and a drive to write fiction. We’re not talking signs or hints of these mental propensities: they’re already here, in the book which (I hope) you’re about to read. If that weren’t enough, The Reason I Jump unwittingly discredits the doomiest item of received wisdom about autism—that people with autism are antisocial loners who lack empathy with others. Naoki Higashida reiterates repeatedly that no, he values the company of other people very much. But because communication is so fraught with problems, a person with autism tends to end up alone in a corner, where people then see him or her and think, Aha, classic sign of autism, that. Similarly, if people with autism are oblivious to other people’s feelings, how could Naoki testify that the most unendurable aspect of autism is the knowledge that he makes other people stressed out and depressed? How could he write a story (entitled “I’m Right Here” and included at the end of the book) boasting characters who display a range of emotions and a plot designed to tweak the tear glands? Like all storytelling mammals, Naoki is anticipating his audience’s emotions and manipulating them. That is empathy. The conclusion is that both emotional poverty and an aversion to company are not symptoms of autism but consequences of autism, its harsh lockdown on self-expression and society’s near-pristine ignorance about what’s happening inside autistic heads.

For me, all the above is transformative, life-enhancing knowledge. When you know that your kid wants to speak with you, when you know that he’s taking in his surroundings every bit as attentively as your nonautistic daughter, whatever the evidence to the contrary, then you can be ten times more patient, willing, understanding and communicative; and ten times better able to help his development. It is no exaggeration to say that The Reason I Jump allowed me to round a corner in our relationship with our son. Naoki Higashida’s writing administered the kick I needed to stop feeling sorry for myself, and start thinking how much tougher life was for my son, and what I could do to make it less tough. Virtuous spirals are as wonderful in special-needs parenting as anywhere else: your expectations for your child are raised; your stamina to get through the rocky patches is strengthened; and your child senses this, and responds. My wife began to work on an informal translation of Naoki’s book into English so that our son’s other carers and tutors could read it, as well as a few friends who also have sons and daughters with autism in our corner of Ireland. But after discovering through Web groups that other expat Japanese mothers of children with autism were frustrated by the lack of a translation into English, we began to wonder if there might not be a much wider audience for Naoki Higashida. This English translation of The Reason I Jump is the result.

The author is not a guru, and if the answers to a few of the questions may seem a little sparse, remember he was only thirteen when he wrote them. Even when he can’t provide a short, straight answer—such as to the question “Why do you like lining up your toys so obsessively?”—what he has to say is still worthwhile. Naoki Higashida has continued to write, keeps a nearly daily blog, has become well known in autism advocacy circles and has been featured regularly in the Japanese Big Issue. He says that he aspires to be a writer, but it’s obvious to me that he already is one—an honest, modest, thoughtful writer, who has won over enormous odds and transported first-hand knowledge from the severely autistic mind into the wider world; a process as taxing for him as, say, the act of carrying water in cupped palms across a bustling Times Square or Piccadilly Circus would be to you or me. The three characters used for the word “autism” in Japanese signify “self,” “shut” and “illness.” My imagination converts these characters into a prisoner locked up and forgotten inside a solitary confinement cell waiting for someone, anyone, to realize he or she is in there. The Reason I Jump knocks out a brick in thewall.